I expected better

[hidperf]

Went to the track tonight for the first time since I put the 4.10's in and did the J-mod. I was expecting more.

60 fts still sucked

Last years best was 15.110@93.89 with a 2.339 60ft

Tonights best was 14.879@93.75 with a 2.262 60ft:(

[TAKEDOWN]

I don't know if those mods are meant to produce real Horse Power, I believe they assist in HP.

[Paul T. Casey]

If the only mods you have done are gears and jmod, then I'd have expected just a little better, although it could be right considering the "track variables." If you have other mods, then you're probably off somewhere.

[Blackmobile]

That 60' time equates to you sitting at the light listening to your tires spin. I think you may be trying to launch too hard. Do you preload, and if you do, at what RPM?

[ctrlraven]

Yeah reading the 60ft time can tell almost the whole story. If you have 4.10s your trap speed should be a little higher.

Do you also have a tune? Make sure you turn OverDrive Off and Traction Control Off. Try to go around the water box and then do a quick spin of the tires to clean them off. Also check your tire psi after each run, if your running stock tires you can take the psi down to about 26psi but I would try taking 2 lbs out at a time and try it that way from stock 35psi level.

[BUCKWHEAT]

Steve, lets go to the track tonite & have you try my Nitto 305 DR's. That should help you get to a 2.0 or under 60 ft time & then see where you end up on top end, assuming no rain. Give me a call.


Went to the track tonight for the first time since I put the 4.10's in and did the J-mod. I was expecting more.

60 fts still sucked

Last years best was 15.110@93.89 with a 2.339 60ft

Tonights best was 14.879@93.75 with a 2.262 60ft:(

[ctrlraven]

I think the 305 DR's would be a little over kill with those times and trap speeds. The avg. I have since for example: intake, tune and 4.10 gears has been 14.30.14.50 on an otherwise stock car.

[hidperf]

Mods so far are just K&N intake, Lidio 93octane tune, 4.10s and Jmod.

It was definitely traction issues, which I expected with the 4.10s. Overdrive was always off and no traction control (300A). I drove around the water box, spun the tires to clean off any water and I tried different launch methods. From dead idle, foot brake at 1100 and foot brake at 2000. The one thing I didn't mess with was tire pressure, which I know is high. I actually didn't think of it until it was late and they were closing the staging lanes. :burnout:

It's been a while since I had a car that I needed to worry about the little things like that. Last one was an 11 second Ford Fairmont back in '95.:beer:

John, I can't make it to the track tonight but thanks for the offer. I'm thinking of trying to make the November daytime T&T if I can get to them. Maybe we can hook up on one of those days.

[chader]

how low of tire pressure can you go on regular radial tires????

[Blackmobile]

Anything under 20 PSI and you're on your own. :D

[Pops]

I used to run around 22 on the rear tires. Start around 28 and let 2 pounds out till you get some grip. I would not go below 20 like Ed said. You need to roll into the throttle instead of flooring it.
Good luck and let us know how it works out. Remember you can also put more in the fronts also! Just remember to reset them before you leave the track!

John

[ctrlraven]

Yeah I bet your tire psi was too high. The track I ran on was 20ft above sea level and I found that 25-26psi seemed to work the best for me on radials, then I moved to kdw2 summer only tires and ran down to 22psi for the best grip.

Here are some other tips: Pump up your front tires to 40 psi, turn off your air suspension the night before going to the track, remove any extra weight out of the car (spare, trunk organizer, etc) and take out your driver's side head light.

Some say taking the headlight out and turning off the rear air doesn't do anything but if you think about it, with no headlight in more fresh cool air can meet the air filter and with the air suspension off it can help with weight transfer to the rear for better traction. Oh also hit the track with like 1/4 tank of gas, every gallon is about 8 lbs. 19 gallons = 152 lbs, myth is for every 100 lbs removed can equal 1 tenth faster in the 1/4 mile.


Weight transfer examples, was cutting 2.1x 60ft's with intake, tune, and few other little mods that don't count for much.
http://i11.photobucket.com/albums/a164/ctrlraven/capitol%20raceway%20marauder%2 0pics%20%20mine/IMG_9831.jpg
http://i11.photobucket.com/albums/a164/ctrlraven/capitol%20raceway%20marauder%2 0pics%20%20mine/IMG_6042.jpg

[hidperf]

Yeah I bet your tire psi was too high. The track I ran on was 20ft above sea level and I found that 25-26psi seemed to work the best for me on radials, then I moved to kdw2 summer only tires and ran down to 22psi for the best grip.

Here are some other tips: Pump up your front tires to 40 psi, turn off your air suspension the night before going to the track, remove any extra weight out of the car (spare, trunk organizer, etc) and take out your driver's side head light.

Some say taking the headlight out and turning off the rear air doesn't do anything but if you think about it, with no headlight in more fresh cool air can meet the air filter and with the air suspension off it can help with weight transfer to the rear for better traction. Oh also hit the track with like 1/4 tank of gas, every gallon is about 8 lbs. 19 gallons = 152 lbs, myth is for every 100 lbs removed can equal 1 tenth faster in the 1/4 mile.


Weight transfer examples, was cutting 2.1x 60ft's with intake, tune, and few other little mods that don't count for much.
http://i11.photobucket.com/albums/a164/ctrlraven/capitol%20raceway%20marauder%2 0pics%20%20mine/IMG_9831.jpg
http://i11.photobucket.com/albums/a164/ctrlraven/capitol%20raceway%20marauder%2 0pics%20%20mine/IMG_6042.jpg

Thanks for the info. I'll mess with tire pressure next time for sure. When I run my cars, I run them just how I drive them every day so I don't get any false sense of security. lol
If it was a race car I'd take out as much as I could but on a car like this, I won't go through all the trouble just for a time slip. I'm sure removing the headlamp and all that weight would make a difference for sure though. I've seen it work in the past.

I think the problem was I dropped .7 with just the intake and 91octane Lidio tune so I was expecting the same or more with the Jmod, gears and 93octane tune. The track was hooking pretty good last night for the drag radial cars that could put some heat into them. And I know I have over 35psi in my rear right now. I'll just have to go back when I have time.

[ctrlraven]

Yeah I hear exactly what your saying. I used to do the same thing with running at the track the way I would drive on the street until I started using my drag radials. I just take out whatever is in the trunk and run the least amount of gas (safe amount still) that I can.

My friend in his 89 GT and I were closely matched, I was usually 2 tenths faster but he learned real quick to start checking his tire psi. He spun for I don't know how long and his rears were around 40 psi lol.
http://www.youtube.com/watch?v=t0qR6-uNTKo

[Zack]

You are using a 91 octane tune, thats the problem.
Thats the same or LESS timing than stock. (Id have to check for specific amount)

When I was NA, I ran 25psi in the stock tires.

[hidperf]

You are using a 91 octane tune, thats the problem.
Thats the same or LESS timing than stock. (Id have to check for specific amount)

When I was NA, I ran 25psi in the stock tires.

No, I was running the 93 octane tune on these passes. I was just comparing how much I gained last year when I ran the 91 octane tune BEFORE I put the 4.10s in.